Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
79% | 21% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
79% | 21% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 16°C | 79% |
| 17°C | 20% |
| 18°C | 1% |
| 10°C or below | 0% |
| 11°C | 0% |
| 12°C | 0% |
| 13°C | 0% |
| 14°C | 0% |
| 15°C | 0% |
| 19°C | 0% |
| 20°C or higher | 0% |
Market context
Wellington’s August weather is usually cool, windy and changeable rather than hot, with typical monthly highs around 12–13.6°C and average lows near 9°C, so a very warm reading on 3 August would be unusual. Long-run climate summaries also show August as Wellington’s coldest month, with substantial rain and persistent wind limiting strong daytime heating[1][2][7].
That matters because the market is settling on the *day’s* peak at Wellington International Airport, not the average for the month. Historical comparables suggest most August afternoons cluster in the low teens Celsius, while past August records can reach the low 20s in exceptional spells; the market’s 0% yes pricing implies traders see a very low chance of an outlier event on this specific date. The relevant question is therefore whether the airport sees an above-normal burst of sun and offshore flow, rather than whether August is generally mild[2][6][13][15].
The main catalyst to watch is the short-range forecast and any update to the airport observation chain before the settlement window closes, because a late change in wind direction or cloud cover can materially shift the daily maximum. For weather markets, the most useful signals are the MetService local forecast and the Wunderground daily history page the contract uses for resolution, since the latter records the highest temperature for the day at Wellington Intl Airport Station[8][9]. If a warm northerly event is mentioned in forecasts, that would be the clearest reason to reassess the current 0% implied probability[8][9].
Methodology
This page tracks Highest temperature in Wellington on August 3? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.
Resolution & payout
For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.
FAQ
- What resolution source is used for elections?
- Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.
- Which platform has the deepest political liquidity?
- Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.
- How fast do political markets react to news?
- High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.
- Are political prediction markets legal in my country?
- It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.
- Which political events have the biggest volume?
- US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.
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